'What is so impressive about this monumental work is its completeness. Frankel has gone back to the original sources and papers, to ensure complete understanding of the scientific issues involved. I recommend these volumes to anyone interested in the subject.' Dan McKenzie, University of Cambridge 'Detailed and painstakingly researched, this account is the culmination of the author's research into this ... Read moretopic over more than thirty years. It is difficult to imagine a more comprehensive analysis of the relevant literature and of the attitudes of the scientists involved.' Fred Vine, Emeritus Professor, University of East Anglia 'Frankel has performed a huge and very valuable effort in pulling together not only original published sources but also unpublished correspondence from key authors, creating a timely and consistent picture of the crucial period when this revolution in the earth sciences occurred.' Lynn R. Sykes, Lamont-Doherty Earth Observatory, Columbia University Praise for the 4-volume collection: '… an unparalleled study of remarkable depth, detail and quality of a key development in our ideas about how the Earth functions … because Frankel draws on his extensive oral historical work with the key players in the development of plate tectonics, this is a study which can never be repeated in terms of its proximity to the events narrated, so many of those key players now being deceased.' Progress in Physical Geography Show Less